Electric welding apparatus



7 A. G. JAEGER ELECTRIC WELDING APPARATUS Filed Nov. 20. 1922 fnueizgz for 5y @251 5y;

r ams May 6, 1924.

name STATES P F l C E Aren't-or mom) a. non, or nervous, IOWA.

nwrarc wmme 'mmrus.

Application fled Iovember :0, 1m. Serial Io. 001,909.

To all whom it may concern."

Bait known that I, Anxonu G. Jason, 1:. citizen of the United States of America, msiding at Dubuque, in the county of Dubuque and State of Iowa, have invented certam new and useful Improvements in Electric Welding 'piparatus ofwhichthe following is a speci cation.

My invention relates to gasoline engine driven electric arc welding, and cutt' plants and mono particularly to a portab welding outfit.

The object of my invention is in the pros vision of a rtable arc weldi and cutting plant, capa le,- due to the particular formation thereof, of thesameworking capacity combustion engine.

, oi a same capacity as other outfits of much tion 10, adap current for we dingv and cutting. ing generating dynamo is mounted an assembly to ject ' erati'ng has mounted upon as outfits of much terweight. 'Another-obgect o m invention is in the prov sion of a; particu r means in connection with an internal combustion engine and the; dynamo 'in an arc welding and on fiant, whereb thelcontin'uous intermittent eavy load, w ich' is put u n the generating dynamo, will be absorbed fore it can be transmitted to the internal A still further object of m invention is in the revision of an arc welding and cutting on t tlida ted to, ahbsorbflthe intermd ittent a u n e generating ynamo, with the resulti that there is tpractically .no jar attendin the operation ereof, which rmi ts the uil 'f of an outfit so light in wei t'that it is easily portable and capable rj'slze and welght. a a '.Other pbjectsof.'my invention appear in the following 8 ification in connection with the annexed r'awings in which:

figure, is- .a perspective view of my, portable arcweld' and cutting lant. o. In the drawin have shown a ase porto be placed u n a truck 11, for portability. At 12, is own an internal combustion engine and at 13, a start- .generatin' d namefor suppl ing. the ma y I 6 in a ten.- n the base 10, by means of described later. The obof this tensionedmeunt'ing is to provide a,yield ing contact between sa d generating d o and internal combust on engine, w ich is vprovided in the following An, extension 14, of the shaft o sioned'manner u butting connection with the ground lpllate 31, upon end a friction wheel 15. This wheel 15, is

intermediate point and is connected with the end late by means of an adjustable bolt mem r 26. Coiled springs 27, abutting the transverse. late 25, at one end and the bearings 18 an 19- of the plate 17, at the other, provide means for yieldabl positioningv the nerating dynamo in suc manner'that the ub or pulley 15, is always maintained in a tensioned manner against the inner periphery of the fly wheel'of the engine.

, A radiator 28, having the formal connections .with the internal combustion engine provides means for cooling thedevice. A'starting crank 29, is shown on the in ternal combustion en no and provides the usual means for starting the outfit.

In the drawings, I have shown an oper-' ator in the course of a practicable operation, wherein there is illustrated one of the usual assemblies in electric arc welding and At 30, is shown the ground wirein which the work is placed. e operator is shown spin the welding tool 32, in which t e wel ing-metal ,33, is firmly but releasably held. The connection 34, supplies the welding current from the gener ating. dynamo. o a For arc welding the operation of the device is as follows:' a y I The starting of the internal combustion engine and its continuous operation, simultaneously 0 rates the starting generating dynamo, w ich provides the current for welding. This welding current is transferred to the welding tool through the con-' motion 34. In the welding operation, the operator melts the welding metal; upon the work at the point where the contact is made, theplate bein a ground member, completes the circuit. n the practical operation, the

welding metal is up rather quickly and a new rod of metal replaced in the welding tool. Due to the fact that the work is placed upon a block which is grounded, when the operator brings the welding tool, or rather, welding metal to a point near the work, the so-called arc will be made, in other words, the contact is completed in the electrical circuit and at this time there is sutficient heat generated to melt the welding metal in order that it may be used as desired.

When the arc is made, or rather, the completion of the electrical circuit, there is a tremendous load placed on the generating dynamo which, up to this time, has been running idle. The load on the generating dynamo is transmitted directlyto the internal combustion engine and in the conventional arc welding plants is attended with a noticeable jar-and strain thereon, until the engine gradually overcomes the load. In viewof the fact that the operator is continually using up the welding material and replacing it. there is a continually intermittent and severe load upon the generator, with the resulting strain and jar upon the engine.

For cutting, the operation of the device is much the same as that of welding with the exception that a carbon or graphite electrode is placed in the tool in place of welding rod. Instead then of depositing metal as in welding, the are formed cuts the metal.

During this operation there is a continual fluctuation of amperage or load caused by the various distances the operator holds the carbon from the work. This fluctuation of amperage amounts to from 10 to 100 am-.

peres and in order to maintain a stabilized and steady arc these sudden and very frequent shocks must be provided for.

It is essential in electric welding that the operator maintain a steady and stabilized arc to procure the proper fusion of, the metals. The are must be struck on the instant and maintained at proper amperage throughout the operation. engagement then acts as a sort of cushion and helps materially in stabilizing the arc. During a welding operation, especially when the operator is an apprentlce, the welding rod sometimes freezes to the work; In this event the load or amperage on the generator jumps from his welding amperage whether it be 50-75 or 100 amperes to 225 amperes, the capacity of the generator. This shock comes on the instant and is usually attended with breakage either in the engine, generator or transmission.

However, it is to overcome this severe strain upon the en inc and plant that the applicant has provided a yielding frictional contact between the engine and generating dynamo, with the result that, when the load is placed upon the generating dynamo, there .In tfie case of outfits equipped with gear jar on the engine and con My frictional,

and strain upon the engine will be reducedpractically to a minimum. I

To realize the results which applicant attains in minimizing the strain upon his plant, it may be said that he is enabled to produce a machine of substantially one-half the weight and still have an equal working capacit 5 The arc welding and cutting art discloses direct gear connections between the en 'ne and enerating dynamo, also chain and 1t.

connections, the machines are of great weight and with very large gear whee s to prevent, breakage, due to the intermittent jar attending the making of the arc and resultant load upon the generatingl dynamo which is transmitted directly to t e engine.

Even in these exceedingly heavy plants, the

readily noticed when the 10 the generating dynamo.

Likewise in the welding plants equipped with chain and belt, the constant intermittent jar gradually wears .them down until they break and are replaced.

It is realized that in a belt construction there is a' slight slippa e, but this slippage only lasts until the be t really takes hold, whereupon the jar is transmitted to the engine and a severe strain is placed on the belt. Again in belted drive construction it has been found that the belt invariably flies oifAwhen a sudden load is placed thereon.

s a kinds 7 weather, the belt has been found very unsatisfactory on account of the effect of damp or rainy weather which causes the belt to stretch.

The friction members on my drive construction are not effected by climatic conditions. In a belt construction, the jar is not gradually compensated for as 1n=my resent structure, where the engine is permitted to is placed on uent strain is i portable unit which is in use in all pick up the load instantly and maintain it.

ating dynamo for supplying the current for weldingand means for relieving the a paratus of suddenly applied electrical oad comprisin a friction drive connection between sai prime mover and dynamo.

2. Electric arc welding and cuttin apparatus, comprising an internal comustion engine, a generating dynamo for sup lying the current for welding, and means or re- I 1,499,800 v I a lieving the a paratus of suddenly ap lied the current for welding, and means for reeledmcal l compris' a friction rive lieving the :pparatus of suddenly ap lied connection between sai engine and d electrical lo comprising a, friction rive namo, including a pulley mounted in t e connection between said engine and dy- 1 6 dynamo sliaft, a fly-wheel mounted on the namo, includin a. rigid mem r rotated by engine shaft and yield means for main said engine an yieldin means for maintaming said pulley in' rictional engagetaining direct frictions. engagement bement with said fly-wheel. tween said members. Y

3. Electric arc welding and cuttin appa- In testimony whereof I 'aflix my signa- 20 1o ratus, comprising an internal co ustlon ture.

engine, a generating dynamo for supplying ARNOLD G. JAEGER. 

